More info (sort of): After booting today, I used SSH from another machine (successfully logging in). Unfortunately, when the laptop froze, so did my ssh session. The terminal was not "disconnected by host", but it was inert. The laptop has quieted, but not completely silent. Something is whirring in there, but nothing I've tried can get any response from it (except holding down the power key until it powers off).
I can't get anything from Acer; they deliver the machine with Win-10, so that's what they support. Should I write to Intel? As for the "Unknown stepping info" error, because I don't know whether it's related, I'm going to open a help request at Ask Ubuntu. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to libdrm in Ubuntu. https://bugs.launchpad.net/bugs/1656155 Title: System (keyboard & touchpad) freezes Status in libdrm package in Ubuntu: New Bug description: I have a 1-month old Acer Aspire F5-573-58VX that came with Win-10 installed. It relies on its Intel i5-7200u for its graphics (HD 620). It runs Win-10 with no problems (other than Win-10 itself), so I do not suspect the hardware. I succeeded in dual-booting Ubuntu 16.04 with EFI and secure-boot both enabled, but was suffering random freezes at 3-30 minutes of use, even after setting the c-state limit in grub. It hangs both with and without Intel microcode. So I upgraded to 16.10 hoping that a newer kernel would have a fix in it. It's still freezing at random (many apps, and sometimes using only the desktop controls). It still has the c-state parameter in grub. It appears that if I leave the system untouched with the cursor in an empty area, then no freeze will occur (I can see display changing) as long as I don't touch anything. Bittorrent runs reliably overnight, and then the machine can freeze within seconds of my moving the cursor to a control in the morning. Thunderbird is also suspicious: I can work most of an hour OK as long as I never move the cursor over the scroll slider in the folder pane. However, bringing the cursor close enough to change the slider's appearance will usually freeze the machine. Update: I've now experienced a freeze while the cursor was stationary and I was merely typing into an email message window. When it freezes, the machine goes quiet (it's not spinning). There's no message to the GUI, only a sudden halt. When frozen, soft restart and reboot (ctrl-alt-back & ctrl-alt-del) both fail. Only a forced power-off has had any effect. (I'll try your alt+sysreq combos in my next freeze). Synaptic says I have an intel driver update utility installed, but I don't know if it has run. When I try to sudo it, I am told that the command is not found. I have been unable to locate it in the file system. If anyone knows where that goes (or where to hunt), that might be helpful. I do not (yet) know how to ssh into the sick machine to get kernel logs or crash dumps. I'm a user-space programmer, not a sysadmin, so I have a learning curve to open the firewall enough to allow an intrusion, and more learning curves for the cryptic debugging tools. var/log/kern.log has this: Jan 14 10:43:26 prop6 kernel: [ 1.002400] [drm:parse_csr_fw [i915_bpo]] *ERROR* Unknown stepping info, firmware loading failed Jan 14 10:43:26 prop6 kernel: [ 1.002405] i915_bpo 0000:00:02.0: Failed to load DMC firmware [https://01.org/linuxgraphics/intel-linux-graphics-firmwares], disabling runtime power management. Jan 14 10:43:26 prop6 kernel: [ 1.006089] vgaarb: device changed decodes: PCI:0000:00:02.0,olddecodes=io+mem,decodes=io+mem:owns=io+mem Jan 14 10:43:26 prop6 kernel: [ 1.018209] ACPI: Video Device [GFX0] (multi-head: yes rom: no post: no) Jan 14 10:43:26 prop6 kernel: [ 1.018522] input: Video Bus as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/LNXVIDEO:00/input/input5 Jan 14 10:43:26 prop6 kernel: [ 1.018601] [drm] Initialized i915_bpo 1.6.0 20160229 for 0000:00:02.0 on minor 0 Jan 14 10:43:26 prop6 kernel: [ 1.064117] r8169 0000:03:00.1 enp3s0f1: renamed from eth0 Jan 14 10:43:26 prop6 kernel: [ 1.142340] fbcon: inteldrmfb (fb0) is primary device Jan 14 10:43:26 prop6 kernel: [ 1.142437] Console: switching to colour frame buffer device 240x67 Jan 14 10:43:26 prop6 kernel: [ 1.142466] i915_bpo 0000:00:02.0: fb0: inteldrmfb frame buffer device My current work-around is to do as much work as possible in Win-10 :( To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libdrm/+bug/1656155/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
